Hi Galaxia
Try:
mpirun -mca btl ^openib -np 2 hello_world
This should turn off openib at runtime.
A better alternative is to download the OpenMPI tarball and
build it from source.
It will only build support to the hardware you have.
If you do so, use a non-standard installation directory.
This
I am working on a computer running CentOS 5 with 2 Quad-core CPUs (only
one computer, it is not connected with others). Previously the OpenMPI
version was 1.27 and my programs worked fine. After the automatic
upgrade to 1.32 (through yum), I can compile programs but it shows error
in running:
